What issue can result from improper draft in a boiler system?

• A. Increased fuel efficiency
• B. Incomplete combustion
• C. Reduced operational cost
• D. Enhanced temperature control

Answer: (B)

Improper draft in a boiler system can lead to incomplete combustion, which occurs when the fuel is not burned fully due to insufficient air supply or excess flue gas. Incomplete combustion results in the production of carbon monoxide and other harmful byproducts, reducing the overall efficiency of the boiler. It can also cause increased levels of unburned hydrocarbons in emissions, which can have environmental impacts and compromise safety.

Inadequate draft may prevent the proper removal of exhaust gases, leading to a buildup in the combustion chamber. This can not only decrease heat transfer efficiency but may also lead to higher fuel consumption since more fuel would be required to achieve the desired output. Thus, ensuring correct draft is critical for efficient and safe operation of boiler systems.